The Hand Dryers Green Rating is a measure of its effect on the environment. It is a calculation based on the drying time of the hand dryer and its power in use. It gives a rating out of 5, with 5 being the highest, based on the amount of power used to dry hands reflecting the carbon footprint of each hand dryer in use.

It does not take into account the carbon footprint associated with the production, manufacture, storage, transport or installation of the hand dryer.